<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
        <!-- 添加角色按钮区域 -->
        <el-row>
            <el-col>
                <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
            </el-col>
        </el-row>
        <!-- 角色列表区域 -->
        <el-table :data="rolesList" border stripe>
            <!-- 展开列 -->
            <el-table-column type="expand">
                <template slot-scope="scope">
                    <el-row :class="['bdbottom',i1 === 0 ? 'bdtop':'','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
                        <!-- 渲染一级权限 -->
                        <el-col :span="5">
                            <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                            <i class="el-icon-caret-right"></i>
                        </el-col>
                        <!-- 渲染二、三级权限 -->
                        <el-col :span="19">
                            <!-- 通过for循环，嵌套渲染二级权限 -->
                            <el-row :class="['bdtop',i2 === 0?'':'bdtop','vcenter']"  v-for="(item2,i2) in item1.children" :key="item2.id">
                                <el-col :span="6">
                                    <el-tag type='success' closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                                    <i class="el-icon-caret-right"></i>
                                </el-col>
                                <el-col :span="18">
                                    <!-- 通过for循环，潜逃渲染三级权限 -->
                                    <el-tag closable @close="removeRightById(scope.row,item3.id)" v-for="(item3,i3) in item2.children" :key="item3.id" type="danger">{{item3.authName}}</el-tag>
                                </el-col>
                            </el-row>
                        </el-col>
                    </el-row>
                </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column prop="roleName" label="角色名称"></el-table-column>
            <el-table-column prop="roleDesc" label="角色描述"></el-table-column>
            <el-table-column label="操作" width="300px">
                <template slot-scope="scope">
                    <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.id)">编辑</el-button>
                    <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeRolesById(scope.row.id)">删除</el-button>
                    <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                </template>
            </el-table-column>
        </el-table>
    </el-card>

    <!--添加角色列表对话框-->
    <el-dialog
            title="添加角色"
            :visible.sync="addDialogVisible"
            width="50%"
            @close="addDialogClosed">
            <el-form ref="addFormRef" :model="addForm" :rules="addFormRules" label-width="80px">
                <!-- 角色名称 -->
                <el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="addForm.roleName" prefix-icon="iconfont icon-user"></el-input>
                </el-form-item>
                <!-- 角色描述 -->
                <el-form-item label="角色描述">
                    <el-input v-model="addForm.roleDesc" prefix-icon="el-icon-s-promotion"></el-input>
                </el-form-item>
            </el-form>
            <!-- 底部区域 -->
            <span slot="footer" class="dialog-footer">
                <el-button @click="addDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addRoles">确 定</el-button>
            </span>
    </el-dialog>
    <!-- 编辑角色列表对话框 -->
    <el-dialog
            title="编辑角色"
            :visible.sync="editDialogVisible"
            width="50%"
            @close="editDialogClosed">
            <!-- 底部区域 -->
            <el-form ref="editFormRef" :model="editForm" :rules="editFormRules" label-width="80px">
                 <!-- 角色名称 -->
                <el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="editForm.roleName" prefix-icon="iconfont icon-user"></el-input>
                </el-form-item>
                <!-- 角色描述 -->
                <el-form-item label="角色描述">
                    <el-input v-model="editForm.roleDesc" prefix-icon="el-icon-s-promotion"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="editDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editRolesInfo">确 定</el-button>
            </span>
    </el-dialog>
     <!--分配权限对话框 -->
    <el-dialog
            title="分配权限"
            :visible.sync="setRightsDialogVisible"
            width="50%"
            @close="setRightDialogClosed">
            <!-- 树形控件 -->
            <el-tree 
                :data="rightslist" 
                :props="treeProps"
                show-checkbox
                node-key="id"
                default-expand-all
                :default-checked-keys="defKeys"
                ref="treeRef">
            </el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightsDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="allotRights">确 定</el-button>
            </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
    data(){
        return {
            //控制分配权限对话框的显示与隐藏
            setRightsDialogVisible : false,
            //所有的权限数据
            rightslist:[],
            //树形控件的绑定对象
            treeProps:{
                label:'authName',
                children:'children'
            },
            //默认选中的结点ID值s数组
            defKeys:[],
            //当前即将分配权限的角色id
            roleId:'',
            //所有角色列表区域
            rolesList:[],
            //控制添加列表的显示与隐藏
            addDialogVisible:false,
            //添加角色表单数据
            addForm:{
                roleName:'',
                roleDesc:''
            },
            //添加角色列表校验规则
            addFormRules:{
                roleName:[
                    { required: true, message: "请输入角色名称", trigger: "blur" },
                    { min: 1,max: 10, message: "长度在 1 到 10 个字符",trigger: "blur"}
    
                ]
            },
            //控制编辑角色列表的显示与隐藏
            editDialogVisible:false,
            //查询到的角色列表
            editForm:{},
            //添加校验规则
            editFormRules:{
                roleName:[
                    { required: true, message: "请输入角色名称", trigger: "blur" },
                    { min: 1,max: 10, message: "长度在 1 到 10 个字符",trigger: "blur"}
    
                ]
            }
        }
    },
    created(){
        //获取所有的角色列表
        this.getRolesList()
    },
    methods:{
        //获取所有的角色列表
        async getRolesList(){
           const {data:res} = await this.$http.get('roles')
           if(res.meta.status !==200){
               return this.$message.error("获取角色列表失败")
           }
           this.rolesList = res.data
           //console.log(this.rolesList);
        },
        //关闭添加角色提示框时重置
        addDialogClosed(){
            this.$refs.addFormRef.resetFields()
        },
        //添加角色数据
        addRoles(){
            this.$refs.addFormRef.validate(async valid => {
                if(!valid) return
                const {data:res} = await this.$http.post('roles',this.addForm)
                if(res.meta.status !== 201) {
                    return this.$message.error('添加角色操作失败')
                }
                //关闭窗口
                this.addDialogVisible = false
                //提示信息
                this.$message.success('添加角色成功')
                //刷新列表
                this.getRolesList()
           })
        },
        //展示编辑角色对话框
        async showEditDialog(id){
            // console.log(id);
            const {data:res} = await this.$http.get('roles/'+id)
            if(res.meta.status!==200){
                return this.$message.error('查询角色信息失败')
            }
            this.editForm = res.data
            console.log(this.editForm);
            this.editDialogVisible = true
        },
        //监听编辑角色对话框的关闭事件
        editDialogClosed(){
            this.$refs.editFormRef.resetFields()
        },
        //修改用户角色信息
        editRolesInfo(){
            console.log(this.editForm);
            this.$refs.editFormRef.validate(async valid => {
                if(!valid) return
                const {data:res} = await this.$http.put('roles/'+this.editForm.roleId,{
                    roleName:this.editForm.roleName,
                    roleDesc:this.editForm.roleDesc
                })
                console.log(res);
                if(res.meta.status !== 200) {
                    return this.$message.error('更新角色信息失败！')
                }
                 //关闭对话框
                this.editDialogVisible = false
                //刷新数据列表
                this.getRolesList()
                提示修改成功
                this.$message.success('更新角色信息成功！')
            })
        },
        //根据id删除用户信息
        async removeRolesById(id){
            // console.log(id);
            const confirmResult = await this.$confirm('此操作将永久删除该角色信息, 是否继续?', '提示', {
                  showCancalButton: true,
                  showConfirmButton:true,
                  confirmButtonText: '确定',
                  cancelButtonText: '取消',
                  type: 'warning'
             }).catch( err => err)

             if(confirmResult !== 'confirm'){
                 //取消按钮
                return this.$message.info('已经取消了删除')
             }
            //console.log(confirmResult);
            //发起网络请求实现删除功能
            const {data:res} = await this.$http.delete('roles/'+id)
            if(res.meta.status!== 200)
                return this.$message.error('删除角色信息失败')
            
            this.$message.success('删除角色信息成功')
            this.getRolesList()

        },
        //根据id删除权限
        async removeRightById(role,rightId){
            // console.log(id);
            const confirmResult = await this.$confirm('此操作将永久删除该角色的权限, 是否继续?', '提示', {
                  showCancalButton: true,
                  showConfirmButton:true,
                  confirmButtonText: '确定',
                  cancelButtonText: '取消',
                  type: 'warning'
             }).catch( err => err)

            if(confirmResult !== 'confirm'){
                 //取消按钮
                return this.$message.info('已经取消了删除')
            }
            const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
            if(res.meta.status!==200) return this.$message.error('删除角色权限失败')

            this.$message.success('删除角色权限成功')
            role.children = res.data

        },
        //展示分配权限的对话框
        async showSetRightDialog(role){
            this.roleId =role.id
            //获取所有权限数据
           const {data:res} = await this.$http.get('rights/tree')
           if(res.meta.status!==200){
               return this.$message.error('获取权限数据失败')
           }
           //把获取到的权限数据保存到data中
            //    console.log(res);
            this.rightslist = res.data
            // console.log(this.rightslist);
            //递归获取三级结点的id
            this.getLeafKeys(role,this.defKeys)

            this.setRightsDialogVisible = true
        },
        //通过递归的方式，获取角色下所有三级权限的id，并保存到defkeys数组中
        getLeafKeys(node,arr){
            //如果当前node结点不包含 children属性，则是三级节点
            if(!node.children) {
                return arr.push(node.id)
            }
            node.children.forEach( item => {
                this.getLeafKeys(item,arr)
            })
        },
        //监听分权权限对话框的关闭事件
        setRightDialogClosed(){
            this.defKeys = []
        },
        //点击为角色分配权限
        async allotRights(){
            const keys = [
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()
            ]
            const idStr = keys.join(',')
            const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{
                rids:idStr
            })
            if(res.meta.status !== 200){
                return this.$message.error('分配权限失败！')
            }

            this.$message.success('分配权限成功！')
            this.getRolesList()
            this.setRightsDialogVisible =false;
        }
    }
}
</script>

<style lang="less" scoped>
.el-tag{
    margin: 7px;
}
.bdtop{
    border-top:1px solid#eee;
}
.bdbottom{
    border-bottom: 1px solid #eee;
}
.vcenter{
    display: flex;
    align-items: center;
}
</style>